Up to 16 HOURS MUSIC ENJOYMENT: Built-in improved polymer lithium battery, Flame wireless headphones offers up to 16 hours of superior audio performance / talk time after only 2 hours' charge enough power to fuel your intense workout with music for all day. And it will show the remaining battery power of the headphones on your Phone screen. (Note: Please use the charging cable provided on the package) IMMERSIVE SOUND WITH POWERFUL BASS: With 11mm dynamic driversbuilt-in cVc6.0 noise canceling microphones and chip of SBC & AAC audio, Flame wireless sports headphones provides the fantastic sound quality with powerful bass sound and crystal-clear voice calls at any volume. Choose the suitable eartips(XS/S/M/L) to get a better sealing and listening experience for intensified workouts. COMFORT AND SECURE FIT: With Lightweight and ergonomic design, Flame wireless sport earphones is a great combination of comfort and stability with ear-hook and in-ear fitting designed for strenuou